NCLEX RN Practice Question # 910
NCLEX Examination.
Practice Question # 910.
nclex examination
Glaucoma
Description
- A group of ocular diseases resulting in increased IOP
- IOP is the fluid (aqueous humor) pressure within the eye (normal IOP is 10 to 21 mm Hg).
- Increased IOP results from inadequate drainage of aqueous humor from the canal of Schlemm or overproduction of aqueous humor.
- The condition damages the optic nerve and can result in blindness.
- The gradual loss of visual fields may go unnoticed, because central vision is unaffected.
Types
- Primary open-angle glaucoma (POAG) results from obstruction to outflow of aqueous humor and is the most common type.
- Primary angle-closure glaucoma (PACG) results from blocking the outflow of aqueous humor into the
- trabecular meshwork; causes include lens or pupil dilation from medications or sympathetic stimulation.